<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        var arr = [
            {name:"lisi"},
            {name:"html"},
            {name:"css"},
            {name:"vue"},
            {name:"vue"},
            {name:"html"},
        ]
    var res = []
    arr.forEach(item=>{
        if(!res.includes(item.name)){
            res.push(item.name)
        }
    }) 
    console.log(res)
    </script>
</body>
</html>